I have a VS solution and as part of a TeamCity Build, we restore packages from both a private NuGet feed (myget) and the public feed (nuget.org). Most packages restore fine, but
Try using https://www.nuget.org/api/v2instead of https://api.nuget.org/v3/index.json per the nuget docs: https://docs.nuget.org/consume/Command-Line-Reference.